Channel-furnace.



N. V. HANSELL.

CHANNEL FUENAGE.

APPMUATION FILED 11011.11, 1910.

1,043,695, Patented Nov. 5, 1912.

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PRESS N. V.`P1ANSBLL.

CHANNEL FURNAGE.

APPLICATION PILPD N0V11,191o.

1,043,695. Patented N0v.5,1912.

3 SHEETS-SHEET 2.

N. V. HANSELL.`

CHANNEL FURNAGE.

APPLICATION FILED N0v.11,1910.

Patented Nov. 5, 1912.

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UNITED OFFICE.

mns v'. HANSELI'., or :BLooMEILi-i, ANEW JERSEY, AssrGNon' ro AMERICAN Gnommr.

COMPANY, OF NEW YORK, N. Y.,

A conr'ona'rrolv or Limvv YORK;

CHANNEL-EURNACE.

Specification of Letters Patent.

Patented Nov. 5", 1912.

Application filed November 1l, 1910. Serial No. 591 ,856.

To all whom it may concern:

Be it known that I,l NILs V. HANSELL, aY

subject of the King of Sweden, and residing at Bloomfield, in the county of Essex and vState of New Jersey, have .invented a certain new and Improved Channel- Furnace, of which the following is a specification.

My invention relates to furnaces of the channel type land the object of my invention Iis to improve the same in the' features hereafter described and particularly in the` method of feeding the same.

In the accompanying drawings, Figure 1 is a broken diagrammatic plan of a furnace installation in which my invention is embodied; Fig. 2 is a broken longitudinal section through the combustion chamber; Fig. 3 is a vertical cross section of the entrance vestibule of the furnace; Fig. 4; is a longitudinal vertical section of the same; Fig. 5 is a horizontal broken section of my improved feed device; and Fig. 6 is a vertical broken section of the same. 4 v

In channel furnaces as heretofore con-` structed, and illustrated in its most generally used form in the Grondal Patent 876,712, .it has been customary to,V load the briquet trucks at a greater or less distance from the furnace and feed the same to a prhe'ating chamber which is alined, with and forms a continuation of the furnace proper,- so that the trucks are pushed through the preheating chamber directly into the combustion chamber. This is satisfactory practice where labor is cheapand thereis an unlimited amount of room'in which to build the furnace. But where land is valuable and labor high riced, compactness is a desideratum of The combustion gases .however contain cer.

tain constituents which may form valuable by-pro'ducts and if such lay-products are to' .be recovered it is highly desirable that thecombustion gasesbe led tojthe recovering apparatus in as Yslightly diluted condition as possible, since the byproduct constituents are only weakly present in' the gases at best. In the improved furnace of the present application I have provided amore lcomp-act arrangement by locating the preheat-ing chamber 4adjacent and parallel to the fur-' nace proper. Thus from Figs. 1 and 2 it will be seen that the preheating chamber B lies parallel 'with the combustion chamber A, the connection between the'two portions of the furnace being maintained by transverse V`tracks C and D from the entrance and discharge ends 'respectively of' the combustionchamber. The labor of handling-of 'the cars on theirl return to the combustion chamber A is greatly facilitated if the latter is graded uprfromthe entrance to the discharge end r (see Fig. 2)` so that the cars return by gravity down the 'parallel track through the prevheat-ing chamber B. By reason of the elevation of the track at thedischarge end of the furnace, the unloading of the cars is fa` cilitated and ifl desired they may be automatically cleared of their briquets, by a scrapervX arranged at -an angle across the channel of the .furnace and just above the car floor so that as the car is gradually pressed forward by the feed device, to be described later, the briquets are swept into the chute 10 leading to a hopper 11 and the car. rolls into the transfer vtruck P empty. Returning by gravity it is halted at the press 12 to be loaded and then permitted to escend into `the preheating` chamber B where .it awaits its turn to becarried by the transfer truck Q to the vestibule of the comcombustion gases are lblown in above the `trucks at 16 and travel down the 'furnace proper toward the entrance end where they are led from the top. of the furnace at 17- to the separators diagrammatically shown at S. Throughout the length of the combustionchamber the gases are maintained separate .from the cooling gases beneath the trucksin the usual way bymeans of sand troughs secured on the' side walls of ther furnace, into` .which dip'fns on` the sides of the trucks. In entrance -vestibule V ,how-

. ever, a special device mu'stxbe employed to reartrucks" 23 running lon tracks olts'ideft-he the same. While Aany suitable meansmay voe`emprevent the gas and air .commingling as the enteringtruck is fed forward. 'The device vhere'illustrated for that purpose is best understood fromV Figs. 3 to 6. As will be noted from these illustrations, I rovide a shield 18 of the same width and height as the truck floor 19 and provided with side ins-20 ofv the same character. `This shield passes through an angled slotin the rear-wall 21 of the vestibule and is preferably supported on front trucks 22 within the-vestlbuleand Avestibule. "As the car is `fed forward it is obvious that the shield 18: following after 'serves to maintain thegases above the trucks separated from `the ycooling lblast/beneath ployed -t o advanceftheV trucks through the combustion chamber, I prefer -to employ the hydraulic ram24 illustrated, because of the ractically unlimited power available for orcing the trucks up this incline andon the other hand by reason of the slow-steadyy ad'- vance that may be thereby secured. yThis is of particular advantage when-.the feed'of a single truck into the combustion chamber may occupy an hour or more, as A'1s sometimes desirable.- .As' illustrated,jthe ram cylinder is supported upon heavy stationary castings 25 outside the vestibule, while the :plunger 26 passes through a hole. the rear wall of the vestibule and is supported on the forward shield truck 22'.4 The plunger face 27 is formed in any desired fashion, preferably so as to engage the-under frame of the briquet truck.

The transfer truck Q which shifts .the loadedcars from the preheating chamber into the'Vesti-bule ofthe combustion chainber carries `a longitudinal angle iron 28' o upon whichfthe side iinsof the truckst-ravel -in like manner as` they-travel through the sand troughs of the combustion chamber. On Vthe same side of this truck is' carried the sheet 29, the vertical -.portion of which serves as the lower portion of the side wall of the vestibule when the truck is in position; while. thehorizontal portion carries the channel 30 in which the lower edge of the side entrance door 31 of the vestibule i is received.

f The angle iron 32 corresponding to 28, carried by the truck, may -be Vsupportedo'n the stationary bracket 33. ThisV angle iron I' is preferably slightly angled down sidewise Aor its bearing face graded down as shown, the more veasily to permit the side/fin to ride upthereon when the truck is shifted sidewise intothe vestibule. v The method of operation is readily understood.Y The discharged truck shifted to. the head of the return track descends by gravity to the press 12. After securing'its.

charge it passes down farther through the Vpreheating chamber and eventually to the transfer'truck Q, one of the side fins running up on the angle iron 28.- The side entrance door 31 to the vvestibule being now open`,thedoor '34 to the furnace closed, and

-lows through the vestibule tlus maintaining the separation of the gas and air. Inasmuch as all they trucks in the furnace'are in contact they are all simultaneously ad- :vanced by the ram and 4the one at the discharge end of the furnace is pushed on to thetransfer truck` P, atthe same time being cleared-of its load by the scraper X. When the' ram has advanced the entering truck beyond the vestibule, it is retracted, the-doorv 34 ,dropped'and -the door 31 lifted, and the fempty transfer truck Q shifted to the lower endof the` preheating channel to -receive a freshl truck'whichis returned to the vestibule, as explained. While the fresh truckis thus being brought into position for passage through the furnace, the empty truck at the discharge end is being shifted to the head off'the return track by the transfer truck P and -the latter returned to' position to receive a new truck'from the furnace.

The furnace shown Tmay be .variously .modified without .departing from my-invention, and'I-do not limit-myself to the details of construction :shown,but claim as my invention 1. A channel furnace having awcombustion chamberand an .adjacent lpreheating chamber, means for leading combustion' and A cooling gases separately through the combustion chamber and means -fforvleading'the coo ing gas alone to the preheating chamber.

2. A channel furnace havingv a 4combustion chamber and a'preheating chamber laterally, adjacent thereto,l -1 means: fforl leading a combustion gas to saidcombustion cham-` ber above the trucks therein, means for-lead ing a4 cooling gas beneathsaidtrucks, means' for-maintaining said gases separated from each other, 1n combinationA with'rmeans for leading the cooling -gas alone to the preheate Y `3. In ay channel I furnace, a combustion chamber, a vestibule opening thereto for the introduction of a new truck, means for maintaining the space above and below4 the trucks separated, in combination with a shield arranged to follow said new truck as it is fed forward into the combustion chamber and to maintain gases above separated from those below the trucks, substantially as described.

4. In a channel furnace, a combustion chamber, a vestibule opening thereto adapted to receive a fresh truck, means for isolating the gases in the upper portion of the chamber from those below thel trucks, in combination with a shield arranged to follow the truck through the vestibule as it is fed forward into the combustion chamber and to prevent the commingling of-said gases in the vestibule, said shield being -mounted at its forward end upon wheels,

substantially as described. v

5. In a channel furnace, a combustion chamber, a vestibule opening thereto adapted to receive a new truck, means for separating the gases in the upper portion from those in the lower portion of the combustion chamber, in combination with a shield following the said truck as it is fed forward ,into the combustion chamber; said shield being carried at its lforward end upon 'a truck, in combination with a hydraulic ram for feeding said new truck forward, they forward end of said ram being mounted upon said shield truck, substantially as described.`-

6. A channel furnace closed at its entrance end and open at its discharge end, in combination with means vfor slowly and continuously advancing trucksthrough fthe furnace together with a stationary Scraper. arranged at the dischargeend of thev furnace'for automatically discharging the trucks-:asthey are slowly passed out of the furnace beneath the said scraper.

7. A tunnel furnace provided with a vestibule adapted to be sealed against the furnace` and the external air, and having a track laid therein for bringing lcars into said vestibule, in combination with a device adapted to impart-a gradual and uniform movement to cars through the vestibule and furnace, said movementfimpartmg device" consisting of a platform car running on l 'and uniforrnforward movement, said de vice consisting ofa platform car running onrails and having attached to one of its axleswhich always remains within the ves-` tibulea plunger passing through a wall of the vestibule and operated by a force pump,

and means for-rapidly returning the plat-- formcar to its starting point.

'In' testimony vwhereof I have signed my name to this specification, in the presence of two subscribing witnesses. l `v NLV. HANSELL. Witnesses:

T. DEPLNGHE, E. D. WRIGHT. 

